Nut 1 is connected by a screw pair to bolt 5 whose head a is inserted in a T-slot of the base. Bolt 5 passes with clearance through holes in supporting member 3 and lever 4 which turns about pin A of member 3. Workpiece 2 is clamped by lever 4 when nut 1 is tightened. Supporting member 3 can be adjusted along the T-slot to enable workpieces of various width to be clamped. Spring 6 raises lever 4 to its initial position when nut 1 is released.
$209$SL,GC$